diff --git a/frontend/composables/partials/use-store-factory.ts b/frontend/composables/partials/use-store-factory.ts
index 1e62d396e..0a510b25d 100644
--- a/frontend/composables/partials/use-store-factory.ts
+++ b/frontend/composables/partials/use-store-factory.ts
@@ -52,7 +52,7 @@ export const useStore = function <T extends BoundT>(
       return await storeActions.refresh(1, -1, params);
     },
     flushStore() {
-      store = ref([]);
+      store.value = [];
     },
   };
 
diff --git a/frontend/composables/store/index.ts b/frontend/composables/store/index.ts
index 9dad0b7f1..265917e22 100644
--- a/frontend/composables/store/index.ts
+++ b/frontend/composables/store/index.ts
@@ -1,7 +1,31 @@
-export { useCategoryStore, usePublicCategoryStore, useCategoryData } from "./use-category-store";
-export { useFoodStore, usePublicFoodStore, useFoodData } from "./use-food-store";
-export { useHouseholdStore, usePublicHouseholdStore } from "./use-household-store";
-export { useLabelStore, useLabelData } from "./use-label-store";
-export { useTagStore, usePublicTagStore, useTagData } from "./use-tag-store";
-export { useToolStore, usePublicToolStore, useToolData } from "./use-tool-store";
-export { useUnitStore, useUnitData } from "./use-unit-store";
+import { resetCategoryStore } from "./use-category-store";
+import { resetFoodStore } from "./use-food-store";
+import { resetHouseholdStore } from "./use-household-store";
+import { resetLabelStore } from "./use-label-store";
+import { resetTagStore } from "./use-tag-store";
+import { resetToolStore } from "./use-tool-store";
+import { resetUnitStore } from "./use-unit-store";
+import { resetCookbookStore } from "./use-cookbook-store";
+import { resetUserStore } from "./use-user-store";
+
+export { useCategoryStore, usePublicCategoryStore, useCategoryData, resetCategoryStore } from "./use-category-store";
+export { useFoodStore, usePublicFoodStore, useFoodData, resetFoodStore } from "./use-food-store";
+export { useHouseholdStore, usePublicHouseholdStore, resetHouseholdStore } from "./use-household-store";
+export { useLabelStore, useLabelData, resetLabelStore } from "./use-label-store";
+export { useTagStore, usePublicTagStore, useTagData, resetTagStore } from "./use-tag-store";
+export { useToolStore, usePublicToolStore, useToolData, resetToolStore } from "./use-tool-store";
+export { useUnitStore, useUnitData, resetUnitStore } from "./use-unit-store";
+export { useCookbookStore, usePublicCookbookStore, resetCookbookStore } from "./use-cookbook-store";
+export { useUserStore, resetUserStore } from "./use-user-store";
+
+export function clearAllStores() {
+  resetCategoryStore();
+  resetFoodStore();
+  resetHouseholdStore();
+  resetLabelStore();
+  resetTagStore();
+  resetToolStore();
+  resetUnitStore();
+  resetCookbookStore();
+  resetUserStore();
+}
diff --git a/frontend/composables/store/use-category-store.ts b/frontend/composables/store/use-category-store.ts
index bfa074d30..86121ce68 100644
--- a/frontend/composables/store/use-category-store.ts
+++ b/frontend/composables/store/use-category-store.ts
@@ -7,6 +7,12 @@ const store: Ref<RecipeCategory[]> = ref([]);
 const loading = ref(false);
 const publicLoading = ref(false);
 
+export function resetCategoryStore() {
+  store.value = [];
+  loading.value = false;
+  publicLoading.value = false;
+}
+
 export const useCategoryData = function () {
   return useData<RecipeCategory>({
     id: "",
diff --git a/frontend/composables/store/use-cookbook-store.ts b/frontend/composables/store/use-cookbook-store.ts
index f299a8436..8e5bc4cc1 100644
--- a/frontend/composables/store/use-cookbook-store.ts
+++ b/frontend/composables/store/use-cookbook-store.ts
@@ -7,6 +7,12 @@ const cookbooks: Ref<ReadCookBook[]> = ref([]);
 const loading = ref(false);
 const publicLoading = ref(false);
 
+export function resetCookbookStore() {
+  cookbooks.value = [];
+  loading.value = false;
+  publicLoading.value = false;
+}
+
 export const useCookbookStore = function (i18n?: Composer) {
   const api = useUserApi(i18n);
   const store = useStore<ReadCookBook>("cookbook", cookbooks, loading, api.cookbooks);
diff --git a/frontend/composables/store/use-food-store.ts b/frontend/composables/store/use-food-store.ts
index 3d2ae23f0..68a19d252 100644
--- a/frontend/composables/store/use-food-store.ts
+++ b/frontend/composables/store/use-food-store.ts
@@ -7,6 +7,12 @@ const store: Ref<IngredientFood[]> = ref([]);
 const loading = ref(false);
 const publicLoading = ref(false);
 
+export function resetFoodStore() {
+  store.value = [];
+  loading.value = false;
+  publicLoading.value = false;
+}
+
 export const useFoodData = function () {
   return useData<IngredientFood>({
     id: "",
diff --git a/frontend/composables/store/use-household-store.ts b/frontend/composables/store/use-household-store.ts
index a472b43ae..468ebd807 100644
--- a/frontend/composables/store/use-household-store.ts
+++ b/frontend/composables/store/use-household-store.ts
@@ -7,6 +7,12 @@ const store: Ref<HouseholdSummary[]> = ref([]);
 const loading = ref(false);
 const publicLoading = ref(false);
 
+export function resetHouseholdStore() {
+  store.value = [];
+  loading.value = false;
+  publicLoading.value = false;
+}
+
 export const useHouseholdStore = function (i18n?: Composer) {
   const api = useUserApi(i18n);
   return useReadOnlyStore<HouseholdSummary>("household", store, loading, api.households);
diff --git a/frontend/composables/store/use-label-store.ts b/frontend/composables/store/use-label-store.ts
index 53d4843d4..394b17092 100644
--- a/frontend/composables/store/use-label-store.ts
+++ b/frontend/composables/store/use-label-store.ts
@@ -6,6 +6,11 @@ import { useUserApi } from "~/composables/api";
 const store: Ref<MultiPurposeLabelOut[]> = ref([]);
 const loading = ref(false);
 
+export function resetLabelStore() {
+  store.value = [];
+  loading.value = false;
+}
+
 export const useLabelData = function () {
   return useData<MultiPurposeLabelOut>({
     groupId: "",
diff --git a/frontend/composables/store/use-tag-store.ts b/frontend/composables/store/use-tag-store.ts
index 0faa7e8d4..9526184a4 100644
--- a/frontend/composables/store/use-tag-store.ts
+++ b/frontend/composables/store/use-tag-store.ts
@@ -7,6 +7,12 @@ const store: Ref<RecipeTag[]> = ref([]);
 const loading = ref(false);
 const publicLoading = ref(false);
 
+export function resetTagStore() {
+  store.value = [];
+  loading.value = false;
+  publicLoading.value = false;
+}
+
 export const useTagData = function () {
   return useData<RecipeTag>({
     id: "",
diff --git a/frontend/composables/store/use-tool-store.ts b/frontend/composables/store/use-tool-store.ts
index 059a99228..2cd998e65 100644
--- a/frontend/composables/store/use-tool-store.ts
+++ b/frontend/composables/store/use-tool-store.ts
@@ -11,6 +11,12 @@ const store: Ref<RecipeTool[]> = ref([]);
 const loading = ref(false);
 const publicLoading = ref(false);
 
+export function resetToolStore() {
+  store.value = [];
+  loading.value = false;
+  publicLoading.value = false;
+}
+
 export const useToolData = function () {
   return useData<RecipeToolWithOnHand>({
     id: "",
diff --git a/frontend/composables/store/use-unit-store.ts b/frontend/composables/store/use-unit-store.ts
index 5c5dfffad..b66e2e06f 100644
--- a/frontend/composables/store/use-unit-store.ts
+++ b/frontend/composables/store/use-unit-store.ts
@@ -6,6 +6,11 @@ import { useUserApi } from "~/composables/api";
 const store: Ref<IngredientUnit[]> = ref([]);
 const loading = ref(false);
 
+export function resetUnitStore() {
+  store.value = [];
+  loading.value = false;
+}
+
 export const useUnitData = function () {
   return useData<IngredientUnit>({
     id: "",
diff --git a/frontend/composables/store/use-user-store.ts b/frontend/composables/store/use-user-store.ts
index 03d2a9697..d1440c672 100644
--- a/frontend/composables/store/use-user-store.ts
+++ b/frontend/composables/store/use-user-store.ts
@@ -7,6 +7,11 @@ import { BaseCRUDAPIReadOnly } from "~/lib/api/base/base-clients";
 const store: Ref<UserSummary[]> = ref([]);
 const loading = ref(false);
 
+export function resetUserStore() {
+  store.value = [];
+  loading.value = false;
+}
+
 class GroupUserAPIReadOnly extends BaseCRUDAPIReadOnly<UserSummary> {
   baseRoute = "/api/groups/members";
   itemRoute = (idOrUsername: string | number) => `/groups/members/${idOrUsername}`;
diff --git a/frontend/composables/use-auth-backend.ts b/frontend/composables/use-auth-backend.ts
index 1aeb84c19..227d13494 100644
--- a/frontend/composables/use-auth-backend.ts
+++ b/frontend/composables/use-auth-backend.ts
@@ -1,5 +1,6 @@
 import { ref, computed } from "vue";
 import type { UserOut } from "~/lib/api/types/user";
+import { clearAllStores } from "~/composables/store";
 
 interface AuthData {
   value: UserOut | null;
@@ -101,6 +102,13 @@ export const useAuthBackend = function (): AuthState {
       setToken(null);
       authUser.value = null;
       authStatus.value = "unauthenticated";
+
+      // Clear all cached store data to prevent data leakage between users
+      clearAllStores();
+
+      // Clear Nuxt's useAsyncData cache
+      clearNuxtData();
+
       await router.push(callbackUrl || "/login");
     }
   }